Flatness Of Supporting Surfaces; Machine Frame Mounting Feet (Special Design) - Siemens SIMOTICS SD Operating Instructions Manual

Assembly
5.2 Alignment and fastening
alignment of the coupling, as well as a well-balanced transmission element (coupling, belt
pulleys, fans, etc.), are prerequisites for smooth running with low vibration.
Maximum permissible vibration in operation according to ISO 10816 must be complied
with.
Inadmissible vibration caused for example, by imbalance (drive output element), external
vibration or any resonance in the complete speed range must be avoided.
It may be necessary to completely balance the machine with the drive output element or
the system resonance frequency must be shifted.
● Foot/flange mounting
Use thread sizes specified in EN 50347 for mounting the motor to foundations or to
machine flanges. Attach the machine at four foot or flange holes in a rectangular
configuration with respect to one another. The customer is responsible for selecting the
strength of the fixing elements.
For the fixing elements up to and including frame size 160, property class 5.6 or higher is
recommended, from frame size 180, property class 8.8 or higher.
For IM B14 flanges, select the correct screw length.
Note
Only authorized retrofit partners must be employed to relocate the bolted on mounting
feet at the machine enclosure.
In order to avoid stressing and deforming the motor, ensure that the foot mounting
surfaces are aligned in one plane and are parallel to the machine shaft. Post-machine the
foot mounting surfaces or use thin shims, for example.
5.2.1

Flatness of supporting surfaces

Flatness of the supporting surfaces for conventional motors
5.2.2

Machine frame mounting feet (special design)

Note
For terminal boxes mounted at the NDE (option H08), dimension C can deviate from EN
50347.
For motors with double or triple holes at the NDE, maintain the foot mounting dimensions as
specified in standard EN 50347 .
38
Frame size
≤ 132
160
≥ 180
Flatness
[mm]
0,10
0,15
0,20
Operating Instructions, 05/2014, 5 610 00000 02 000
Low-voltage motors